“Incompetence plus incompetence equals incompetence”

Source: The Peter Principle (1969), p. 107 (The Mathematics of Incompetence)

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Do you have more details about the quote "Incompetence plus incompetence equals incompetence" by Laurence J. Peter?
Laurence J. Peter photo
Laurence J. Peter 26
Canadian eductor 1919–1990

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